2211121221002 has 4 divisors (see below), whose sum is σ = 3316681831506. Its totient is φ = 1105560610500.

The previous prime is 2211121220999. The next prime is 2211121221011. The reversal of 2211121221002 is 2001221211122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1878294919081 + 332826301921 = 1370509^2 + 576911^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 552780305249 + ... + 552780305252.

Almost surely, 2^{2211121221002} is an apocalyptic number.

2211121221002 is a deficient number, since it is larger than the sum of its proper divisors (1105560610504).

2211121221002 is a wasteful number, since it uses less digits than its factorization.

2211121221002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1105560610503.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 2211121221002 its reverse (2001221211122), we get a palindrome (4212342432124).

The spelling of 2211121221002 in words is "two trillion, two hundred eleven billion, one hundred twenty-one million, two hundred twenty-one thousand, two".